Furnace-grate



(No Model.) J 2 Sheets-Sheet 1.

T. T. ROOKETT.

FURNACE GRATE.

Patented Sept 9 1890.

UNITED STATES PATENT OFFICE.

THOMAS T. ROOKETT, OF PHILADELPHIA, PENNSYLVANIA.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 436,194, dated September 9, 1890.

Application filed September 15, 1886- Serial No. 213,578- (No model.)

To all whom it may concern:

Be it known that 'I, THOMAS T. ROCKETT, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Furnace-Grates, of which the following is a specification.

My invention consists in certain improvements in that class of shaking-grates in which the series of grate-bars are vibrated by one handle, the objects of my invention being to simplify the construction of the operating parts and to permit each bar to be inserted pr removed without disturbing the remaining ars.

In the accompanying drawings, Figure l is a plan view of a grate with my improvements. Fig.2 is a section on the line 1 2, Fig.1. Fig. 3 is a sect-ion on the line 3 4, Fig. 1. Fig. 4 is a detached perspective view of one of the grate-bars. Fig. 5 is a detached view of a cover-plate forming part of the structure. Figs. 6, 7, 8, and 9 are diagrams illustrating the operation of the grate, and Fig. 10 is a detached view of a retaining-bar forming part of the structure. Fig. 11 is a perspective View of a portion of the front plate broken away.

A represents part of the casing of the furnace, B the ash-pit, and D the fire-pot having the usual lining, E being the metal top plate of the grate structure and F the grate-bars, which have their rear bearings in a segmental rib e of the plate E and have their front bearings in a bar G, (shown in Figs. 3 and 10,) said bar being hung to lugs g g on the plate E.

The bar G is pivoted to the lugs g, but is detachably secured to the lugs g by a pin g which passes through the front plate of the casing A, so that it can be easily manipulated from the outside of the furnace.

Each grate-bar F has a spindle, on which is a lug f, bearing against the inner face of the bar G and serving to prevent the gratebars from being removed or becoming loose without first lowering the bar G.

The spindle of each grate-bar F has an arm a with right-angled lateral extension a, the several extensions being pivoted atz' to a bar H, which thus serves to connect together all of the arms a.

The pivot-pins i may be formed on the bar the end bar, with a handle I, the end bar be-' ing selected in order that the handle may be situated at one side of the furnace-door.

As'shown in Fig. 6, the grate is at restthat is to say, each grate-bar is flat and the handle I is in an upright positionbut by moving the handle I to the right and left, as shown in Figs. 7 and 8, the bars are rocked so'as to shake the fuel and crush any cinders or clinkers that may pass between the bars.

By turning the handle I down to the position shown in Fig. 9 the armsaare depressed to a position in line with the handle and the grate-bars are caused to assume a vertical position, so as to dump the contents of the fire-pot.

The frame A has in front a series of recesses, a portion of each of which forms a bearing for a grate-bar spindle, other portions being enlarged, and these enlarged portions being under ordinary circumstances closed by means of projections j on a cover-plate J on the inside of the front plate of the casing,

this plate being held in place by means of studs m and keys n or other equivalent means, so that it can be readily released when necessary.

When it is desired to remove one of the grate-bars, the cover-plate J is removed and the pin g withdrawn, so as to permit the bar G to drop. The arm a, of the grate-bar to be removed is then released from the control of the bar H and is turned to the position shown in Fig. 9, after which the grate-bar is moved laterally until it is in line with the adjacent recess in the front plate of the casing, and is then removed longitudinally through said recess. After the grate-bar has been replaced the bar G is elevated and secured in the elevated position by the pin g? and the plate J is returned to its place and secured by the keys or other fastening devices.

By this construction each grate-bar can be easily placed in or removed from position without disturbing the frame or any other portion of the grate, so that the repairing of the grate does not involve the exercise'of any special skill.

I claim as my invention grate and the bars having rear bearings in 1. The combination of the top plate, the said plate, with a front bearing and retaingrate, and grate-bars having front and rear ing bar G, detachably secured to the under journals integral with the body of the bar, side of said top plate, the casing having re- 20 5 bearingsin said plate for the rearjournals, the cesses through which the grate-bars can be front journals of the bars extending through inserted and removed longitudinally, and a orifices in the front plate of the furnace, and cover-plate for the said recesses, all substanbearing-bar G, for the said front journals of tially as specified. the grate-bars, situated in the rear oft-he front In testimony whereof I have signed my 25 10 plate, and lugs on the under side of the top name to this specification in the presence of plate to which the bearing-bar G is detachtwo subscribing witnesses. ably hinged, and with lugsfon each of the journals of the grate-bars adapted to bear THOS. T. ROOKE'IT. against the rear of the bar G, substantially \Vitnesses: I 5 as and for the purpose set forth. l/VILLIAM D. CONNER,

2. The combination of the top plate of the HARRY SMITH. 

